It's possible to increase the load suddenly and don't feel fatigued but maintaining the high load consistently is a different story altogether.
Training load sometimes doesn't tell the full picture especially if you do short distance explosive workouts, you don't generate much load but the fatigue is still high because of the exertion.
If the goal is to sleep at 11+, then ideally one should finish workouts by 9.30pm, and go take a shower. If 12+, then can afford to do later.
Workouts = strengthening/simple plyometrics. Anything more than that, will be harder to sleep.
18/55 should be doable, if I take annual leaves during the peak period. Will take annual leaves for the 80+k weeks on the midweek long run. I have a lot of leaves to use, so can slowly use them for the training block (once a week is sufficient).
18/70 on the other hand, is a different story. I willn't be trying that unless I can get WFH option which my current job doesn't have.
outdoor usually faster since run on 400m track instead of indoor 200m track. She could possibly break the outdoor WR with her indoor times
talking about training load, i think it is not a good performance indicator for me, i can suddenly increase my load, but I dont feel really fatigued. At least for cycling, for running , I go try to see if can suddenly increase load.
Sorry, i just use AI (again )
But generally, cycling is based more towards muscular damage if you overdo it.....not dissimilar to weight/calisthenic/gym workouts.
I'd guess less chance for injury too, but really overdo it in certain extreme ways like over mashing a climb at low cadence, repeatedly, can overstress tendons/ligaments and joints. Recent past 2 months ago, i nearly seriously injured my right arm wrist tendon coz i geh kiang go do one arm deadhang and even 3 fingers one arm deadhang and pushed the limits (i only train normal deadhangs).
Muscles ok, bones ok, wah lan the tendon really feel it, just 1 session, acute liao. For the next 3-4 weeks i got pain and needed to stop my deadhang training, could only continue with pull ups.
That time in 2023 esp, i ran like 70-80km/week range coz i was training for AHM 2023 10k. (I only started cycling from Sep 2023). Totally shagged already, i still remembe reach office open milo tinand Nescafe Gold to do ice milo mocah, then sit down and sip the drink, i will stun till 9.30-9.45 am one. And after that like wanna doze off even with the caffeine. Seems from AI, there is also the neurological CNS aspect
But for cycling, like even nowadays, i do
2X that training duration hours and with only 1 short workout (friday, like today) and daily commuting runs, i happy happy no issue one.
edit - actually closer to 3X the duration of training hours, no thanks to the weekends that i do "junk" volume with my kiddo on the road.

But no leh, the level of fatigue lagi less than when i was pure running.
I and my kid have risen sometimes really early for cycling, as early as 4+ AM during sch hols. What i / we found is that any time earlier than 5.45am, sure shag one, more coz of lack of sleep than anything (can sleep before 9.30pm also, got limit as to how early). My kid wakes up 6.20am weekdays, so > 30 mins earlier than usual he will feel it.
So, i think if i were to go do FM training and > 120km run training,......不如一枪打死我算了吧。
AI Overview
No, increasing the training load drastically in cycling generally does not cause the same level of total body fatigue as running, primarily because cycling is a low-impact, concentric-focused activity. Running involves higher eccentric load (muscle stretching) and repetitive impact, which causes greater, longer-lasting damage and neurological fatigue